Dell PowerEdge R250 EMC BIOS and UEFI Reference Guide - Page 7

SATA Settings, Table 5. Processor Settings details continued, Table 6. Processor n details

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Table 5. Processor Settings details (continued) Option LLC Prefetch Dead Line LLC Alloc Directory AtoS x2APIC Mode Processor Core Speed Processor 1 Table 6. Processor n details Option Family-Model-Stepping Brand Level 2 Cache Level 3 Cache Microcode Description Enables or disables the LLC Prefetch on all threads. This option is set to Enabled by default. Enables or disables the Dead Line LLC Alloc. This option is set to Enabled by default. You can enable this option to enter the dead lines in LLC or disable the option to not enter the dead lines in LLC. Enables or disables the Directory AtoS. AtoS optimization reduces remote read latencies for repeat read accesses without intervening writes. This option is set to Disabled by default. Enables or disables x2APIC mode. This option is set to Enabled by default. NOTE: For two processors 64 cores configuration, x2APIC mode is not switchable if 256 threads are enabled (BIOS settings: All CCD, cores, and logical processors enabled). Specifies the maximum core frequency of the processor. The following settings are displayed for each processor: Description Specifies the family, model, and stepping of the processor as defined by Intel. Specifies the brand name. Specifies the total L2 cache. Specifies the total L3 cache. Specifies the processor microcode version. SATA Settings To view the SATA Settings screen, power on the system, press F2, and click System Setup Main Menu > System BIOS > SATA Settings. Table 7. SATA Settings details Option Embedded SATA Description Enables the embedded SATA option to be set to Off, AHCI mode , or RAID modes. This option is set to AHCI Mode by default. NOTE: 1. No ESXi and Ubuntu OS support under RAID mode. Security Freeze Lock Write Cache Port n Sends Security Freeze Lock command to the embedded SATA drives during POST. This option is applicable only for AHCI Mode. This option is set to Enabled by default. Enables or disables the command for the embedded SATA drives during POST. This option is set to Disabled by default. Sets the drive type of the selected device. For AHCI Mode or RAID modes, BIOS support is always enabled. Pre-operating system management applications 7

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Table 5. Processor Settings details (continued)
Option
Description
LLC Prefetch
Enables or disables the LLC Prefetch on all threads. This
option is set to
Enabled
by default.
Dead Line LLC Alloc
Enables or disables the Dead Line LLC Alloc. This option is set
to
Enabled
by default. You can enable this option to enter the
dead lines in LLC or disable the option to not enter the dead
lines in LLC.
Directory AtoS
Enables or disables the Directory AtoS. AtoS optimization
reduces remote read latencies for repeat read accesses
without intervening writes. This option is set to
Disabled
by
default.
x2APIC Mode
Enables or disables x2APIC mode. This option is set to
Enabled
by default.
NOTE:
For two processors 64 cores configuration,
x2APIC mode is not switchable if 256 threads are enabled
(BIOS settings: All CCD, cores, and logical processors
enabled).
Processor Core Speed
Specifies the maximum core frequency of the processor.
Processor 1
The following settings are displayed for each processor:
Table 6. Processor n details
Option
Description
Family-Model-Stepping
Specifies the family, model, and stepping of the processor as
defined by Intel.
Brand
Specifies the brand name.
Level 2 Cache
Specifies the total L2 cache.
Level 3 Cache
Specifies the total L3 cache.
Microcode
Specifies the processor microcode version.
SATA Settings
To view the
SATA Settings
screen, power on the system, press F2, and click
System Setup Main Menu
>
System BIOS
>
SATA Settings
.
Table 7. SATA Settings details
Option
Description
Embedded SATA
Enables the embedded SATA option to be set to
Off
,
AHCI mode
, or
RAID modes
.
This option is set to
AHCI Mode
by default.
NOTE:
1.
No ESXi and Ubuntu OS support under RAID mode.
Security Freeze Lock
Sends
Security Freeze Lock
command to the embedded SATA drives during POST.
This option is applicable only for AHCI Mode. This option is set to
Enabled
by default.
Write Cache
Enables or disables the command for the embedded SATA drives during POST. This
option is set to
Disabled
by default.
Port n
Sets the drive type of the selected device.
For
AHCI Mode
or
RAID modes
, BIOS support is always enabled.
Pre-operating system management applications
7